Originally Posted by jsimonh
I guess I'm just looking for opinions on what my next step should be. I was thinking about just dropping down .3 to .5 grains and not worrying about it.
Question for you - are you FL resizing and moving the shoulder back at all?? Any idea how many times brass has been fired totally? And last question is - did you notice any resistance when you were chambering a round?
If none of the other suggestions fit - your easiest solution to try is to reduce powder as suggested but summer is coming and so is the heat and you may/maynot be right back to the same problem later on.
I shot a belted 7mm rem mag for years and ran into the same problem after using brass beyond 4-5 times even with FL resizing.
If your brass has had a number of uses you might want to take a look at Larry Willis' belted mag collet die and see if the explanation fits into what you are running into. Innovative Technologies - Reloading Equipment